根据issac3 用Java总结了backtracking template, 我用他的方法改成了Python. 以下为template. 可以用来解决的问题有: Leetcode 78. Subsets , Leetcode 90. Subsets II, Leetcode 4
Given a set of candidate numbers (candidates) (without duplicates) and a target number (target), find all unique combinations incandidateswhere the candidate numbers sums totarget. The same repeated number may be chosen fromcandidatesunlimited number of times. Note: All numbers (includingtarget) wi...
Given a vector of integers and an integer k, we are to find if we can divide the array into k non-empty subsets with equal sums. Return true if we can or otherwise, false. Example 1:Input: arr = [5,2,1,2,3,4,3], k = 4Output: trueExplanation: Possible subsets are- [2,3]...
Given a non-empty array nums containing only positive integers, find if the array can be partitioned into two subsets such that the sum of elements in both subsets is equal. Example 1: Input: nums = [1,5,11,5] Output: true Explanation: The array can be partitioned as [1, 5, 5]...
Breadcrumbs InterviewBit-Practices /Backtracking /Subsets / Combination_Sum_II.py Latest commit HistoryHistory File metadata and controls Code Blame 24 lines (22 loc) · 699 Bytes Raw class Solution: # @param c : list of integers # @param t : integer # @return a list of list of integer...
Subsets是「组合」,Permutations是排列。 那么这题也容易想到,跟subsets相比,把进入下一层dfs的i+1去掉就好了(同时要加上terminator哦)。但是这样一来对于[1,2,3]这样的nums,第一个解会变成[1,1,1]呀。怎么办,增加一个数组来保存是否使用过(模拟HashMap),有点像图的遍历了。或者直接利用ArrayList的contains函...
Given an array of integersnumsand a positive integerk, find whether it's possible to divide this array intoknon-empty subsets whose sums are all equal. Example 1: Input: nums = [4, 3, 2, 3, 5, 2, 1], k = 4 Output: True ...
a combination (a1, a2, … , ak) must be in non-descending order. (ie, a1 ≤ a2 ≤…≤ ak). The solution set must not contain duplicate combinations. For example, given candidate set 2,3,6,7 and target 7, A solution set
Subsets II Problem Given a collection of integers that might contain duplicates, nums, return all possible subsets. Note: The solution set must not contain duplicate subsets. For example, If nums = [1,2,2], a solution is: [ [2], ...
Partition a set into k subset with equal sum: Here, we are going to learn to make partitions for k subsets each of them having equal sum using backtracking.